US3874484A - Resetting device for brakes - Google Patents

Resetting device for brakes Download PDF

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Publication number
US3874484A
US3874484A US416770A US41677073A US3874484A US 3874484 A US3874484 A US 3874484A US 416770 A US416770 A US 416770A US 41677073 A US41677073 A US 41677073A US 3874484 A US3874484 A US 3874484A
Authority
US
United States
Prior art keywords
rod
cap
head
serrations
brake
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US416770A
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English (en)
Inventor
Gyula Nadas
Bernd Wosegien
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Knorr Bremse AG
Original Assignee
Knorr Bremse Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Knorr Bremse Gmbh filed Critical Knorr Bremse Gmbh
Application granted granted Critical
Publication of US3874484A publication Critical patent/US3874484A/en
Assigned to KNORR-BREMSE AKTIENGESELLSCHAFT reassignment KNORR-BREMSE AKTIENGESELLSCHAFT CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE ON 08/30/1985 Assignors: KNORR-BREMSE GESELLSCHAFT MIT BESCHRAENKTER HAFTUNG
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
    • B61H15/00—Wear-compensating mechanisms, e.g. slack adjusters
    • B61H15/0007—Wear-compensating mechanisms, e.g. slack adjusters mechanical and self-acting in one direction

Definitions

  • a device for resetting an automatic adjusting device [21 1 41 ,770 on a brake rod linkage, particularly for railway vehicles, is mounted between an adjustable rod and a brake rod linkage connecting heat rotatably coupled [30]
  • the rod and head are each provided with mutually engagable serrations or teeth [52] U.S. Cl. 188/197, 403/36() and a cap is mounted on the rod to extend over and [51] Int. Cl.
  • a spring is Fleld 0f Search-W 189/196 196 196 positioned between a portion of the cap and a disc is 189/196 Q retained by a snap ring on the connecting head for 164-166, 361 urging the serrations of the head and rod into mutual engagement.
  • the rod can References Clted be rotated with respect to the connecting head.
  • the present invention relates to a device for resetting an automatic adjusting device on the brake rod linkage such as employed in railway vehicles and the like. more particularly, to the rotatable coupling arrangement between an adjustable rod and brake rod linkage connecting head which permits adjustment of the rod with respect to the head.
  • the resetting device to which the present invention relates is inserted into the brake rod linkage of a braking system for railway and other types of vehicles and is employed for adjusting the length of the brake linkage so to maintain a constant clearance between the brake shoes and the brake surfaces independently of the wear of the brake shoes or the surfaces.
  • the resetting devices permit a suitable adjustment to establish and to maintain a predetermined clearance between the brake shoe and the brake lining.
  • An automatic adjusting device for reducing the brake clearance between the brake lining and the brake shoe has been proposed and comprises a device mounted as a component of the brake rod linkage between the brake drum and the corresponding brake shoes.
  • the device is mounted into the rod linkage and cooperates with an abutment on another component of the linkage in order to adjust continuously the total length of the rod linkage to maintain the brake clearance constant.
  • This adjusting device comprises a rod and an adjusting spindle axially displaceable with respect to the rod with the rod and spindle being mounted on components of the rod linkage to be axially displaceablc with respect to each other.
  • a device has also been provided for manually resetting the adjusting device when brake shoes or brake linings are replaced.
  • the rod is provided with a linkage connecting head which is rotatable with respect to the rod and coaxial therewith.
  • the head is provided with a sleeve which extends over the rod.
  • the rod is detachably and rotatably coupled to the connecting head and the sleeve is provided with a conical friction surface which is urged against a corresponding conical friction surface on the adjacent end of the rod.
  • a resilient tightening disc may be provided between the connecting head and the rod.
  • a grip ring may be provided for manual operation of the device.
  • Adjusting devices for brake rod linkages of railway vehicles have also been provided which are not automatically operated but must be adjusted manually.
  • Such devices are included as a component of the brake rod linkage and essentially comprise an adjusting spindle having an external thread and a tubular rod having an internal thread mounted thereon.
  • the rod is provided with a connecting head to the rod linkage with the head being rotatable with respect to the rod and coaxial therewith.
  • the head is provided with a sleeve which extends over the rod.
  • friction forces are produced between the sleeve and the adjacent end of the rod to prevent rotation between the sleeve and the rod.
  • a device for resetting an automatic adjusting device on a brake rod linkage for railway vehicles and the like may be provided between an adjustable rod and a brake rod linkage connecting head which is rotatable coupled to the rod coaxially therewith and is axially movcable with respect to the rod.
  • Mutually engagable serrations are provided on the cooperating ends of the rod and connecting head and a cap is mounted on the rod so as to extend over the end of the connecting head.
  • a spring is provided within the cap to act between a portion of the cap and a suitable abutment on the connecting head in order to urge the serrations into mutual engagement.
  • the serrations are pressed firmly into mutual engagement by braking forces in the linkage, but upon release of the brakes the serrations are mutually engaged only under the force of the spring.
  • the rod can then be adjusted with respect to the connecting head by rotation of the rod and causing the serrations to move with respect to each other.
  • the adjusting device of a brake rod linkage comprises an adjustable rod or spindle l which upon its free end is provided with a head 2 for connecting to the brake rod linkage.
  • the connecting head is coaxial with respect to the rod 1 and is rotatably mounted upon an axial extension 3 of reduced diameter from the rod 1.
  • a corrugated spring ring 4 is positioned upon the connecting head for the purpose of urging serrations or radially extending teeth 5 on the end of the connecting head 2 into mutual engagement with corresponding serrations or teeth 6 carried on the rod 1.
  • the serrations 5 and 6 are in the shape of saw teeth and have a tip angle of about 45. To facilitate centering of the teeth they are preferably mounted on mating conical surfaces coaxial to the rod 1 as shown in the drawing.
  • the serrations 6 are actually formed upon a disc 7 which is mounted on the axial extension 3.
  • a cap 8 is threaded onto the disc 7 and the cap and disc 7 are both attached to the rod 1 by means of a transversely extending pin 9.
  • the cap 8 extends over the end of the connecting head 2 which is adjacent the adjustable spindle l and encloses the spring ring 4.
  • One end of the spring bears against an annular flange 10 formed as a portion of the cap 8 and the other end bears against an annular disc 12 which is retained in position by a snap ring 13 positioned and seated in an annular groove on the outer surface of the connecting head 2.
  • a sealing ring or packing ll seals the cap against the connecting head 2.
  • the disc 12 is provided with a hollow conical shape on one side thereof which partially encloses the snap ring 13 to retain the snap ring in its annular seat.
  • the adjustable rod 1 and the connecting head 2 are prescd toward each other because of the braking forces and the serrations 5 and 6 are thus urged into tight mutual engagement.
  • the rod 1 can be adjusted manually by means of a wrench placed on the outer surface of the cap 8 which may be provided with a hexagonal section.
  • the adjusting device is thus reset with respect to the connecting head 2, since the serrations 5 and 6 can be moved with respect to each when the brakes are in the released position.
  • a device for resetting an automatic adjusting device on a brake rod linkage for railway vehicles and the like the combination of an adjustable rod, a brake rod linkage connecting head rotatably coupled to said rod coaxially therewith and axially moveable with respect thereto, mutually engageable serrations on said rod and head, a cap mounted on said rod and extending over the end of said head, spring means within said cap between a portion thereof and said head for urging said serrations into mutual engagement, a disc attached to said rod and having said rod serrations thereon, said cap being mounted on said disc, and a pin passing transversely through said cap, disc and rod to secure the cap and disc onto the rod.
  • a device for resetting an automatic adjusting device on a brake rod linkage for railway vehicles and the like the combination of an adjustable rod, a brake rod linkage connecting head rotatably coupled to said rod coaxially therewith and axially moveable with respect thereto, mutually engageable serrations on said rod and head, a cap mounted on said rod and extending over the end of said head, spring means within said cap between a portion thereof and said head for urging said serrations into mutual engagement, and a snap ring inserted into an angular groove on said head within said cap, a second disc on said cap engageable with said snap ring, said spring means acting against said second disc to urge said cap serrations into engagement with said rod serrations.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)
US416770A 1972-11-17 1973-11-19 Resetting device for brakes Expired - Lifetime US3874484A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2256431A DE2256431C2 (de) 1972-11-17 1972-11-17 Rückstellvorrichtung für Nachstelleinrichtungen

Publications (1)

Publication Number Publication Date
US3874484A true US3874484A (en) 1975-04-01

Family

ID=5862015

Family Applications (1)

Application Number Title Priority Date Filing Date
US416770A Expired - Lifetime US3874484A (en) 1972-11-17 1973-11-19 Resetting device for brakes

Country Status (8)

Country Link
US (1) US3874484A (xx)
CH (1) CH566882A5 (xx)
DE (1) DE2256431C2 (xx)
ES (1) ES420642A1 (xx)
FR (1) FR2207048B1 (xx)
GB (1) GB1447265A (xx)
IT (1) IT996402B (xx)
SE (1) SE375736B (xx)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5025900A (en) * 1988-06-30 1991-06-25 Sab Nife Ab Sealing arrangement, particularly for a rail vehicle slack adjuster

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3309265A1 (de) * 1983-03-15 1984-09-20 Knorr-Bremse GmbH, 8000 München Selbsttaetige, sofortwirkende nachstellvorrichtung fuer den anlegehub von bremsgestaengen von insbesondere schienenfahrzeugen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1006362A (en) * 1911-03-23 1911-10-17 Thomas C Dawson Shaft-coupling.
US1125035A (en) * 1913-04-14 1915-01-19 L D Spaulding Slack-adjuster for railway-brakes.
US1600822A (en) * 1924-11-28 1926-09-21 American Steel Foundries Brake-slack-adjuster mechanism
US2920724A (en) * 1956-10-26 1960-01-12 Joseph C Margetic Automatic slack adjuster for brakes

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE675677C (de) * 1937-04-07 1939-05-19 Bromsregulator Svenska Ab Selbsttaetige doppeltwirkende Nachstellvorrichtung fuer Fahrzeugbremsen
DE851821C (de) * 1950-04-22 1952-10-09 Bromsregulator Svenska Ab Selbsttaetige Bremsnachstellvorrichtung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1006362A (en) * 1911-03-23 1911-10-17 Thomas C Dawson Shaft-coupling.
US1125035A (en) * 1913-04-14 1915-01-19 L D Spaulding Slack-adjuster for railway-brakes.
US1600822A (en) * 1924-11-28 1926-09-21 American Steel Foundries Brake-slack-adjuster mechanism
US2920724A (en) * 1956-10-26 1960-01-12 Joseph C Margetic Automatic slack adjuster for brakes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5025900A (en) * 1988-06-30 1991-06-25 Sab Nife Ab Sealing arrangement, particularly for a rail vehicle slack adjuster

Also Published As

Publication number Publication date
IT996402B (it) 1975-12-10
DE2256431C2 (de) 1983-12-08
GB1447265A (en) 1976-08-25
CH566882A5 (xx) 1975-09-30
SE375736B (xx) 1975-04-28
FR2207048A1 (xx) 1974-06-14
DE2256431A1 (de) 1974-05-22
FR2207048B1 (xx) 1979-08-03
ES420642A1 (es) 1976-03-01

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Legal Events

Date Code Title Description
AS Assignment

Owner name: KNORR-BREMSE AKTIENGESELLSCHAFT

Free format text: CHANGE OF NAME;ASSIGNOR:KNORR-BREMSE GESELLSCHAFT MIT BESCHRAENKTER HAFTUNG;REEL/FRAME:004495/0631

Effective date: 19851018